A terrorist's dream
This is an incredibly stupid idea. The fact that all emergency is suspended and ALL crime is legal is only a dream for any terrorist. I can only imagine how many people within and outside the united states would plant bombs all over NYC only to detonate wall street and other important buildings possibly sending the world into economic chaos. Businesses would be ruined, GDP would tank, and hospitals would be overcrowded with murder victims.
What happens if someone obtains a bio-weapon and unleashes it on the purge (it would be perfectly legal) imagine the aftermath.
No. Just no. I hate anarchists, and always will.